// document.write({})
// console.log({})
// 12345

let x = 5;
X = 3;
console.log(X + 5);

let a = `"123"`;
console.log(a.length);

if (true) {
	console.log(true);
}
if (false) {
	console.log(false);
}

let cars = [123, 234, 345];
console.log(cars);
cars[0] = 789;
cars[0] = "abc";
cars[3] = null;
console.log(cars);

let cat = { firstname: "xiao", lastname: "mao", age: 3 };
console.log(cat.firstname, cat["firstname"]);
// for (let key in cat) {
// 	console.log(key, cat[key]);
// }

let mouse;
console.log(mouse);

function ppp(a, b) {
	// console.log(a, b);
	return {
		a: a+10,
		b: 5,
		c: (ab) => console.log(ab),
	};
}
let abc1234 = ppp(3);
console.log(abc1234);
abc1234.c(5);

let qqq = function () {
	console.log(qqq);
};

qqq();

let bbb = () => console.log(bbb);

bbb();
